US4616888A - Safety brake for mobile storage apparatus - Google Patents
Safety brake for mobile storage apparatus Download PDFInfo
- Publication number
- US4616888A US4616888A US06/649,692 US64969284A US4616888A US 4616888 A US4616888 A US 4616888A US 64969284 A US64969284 A US 64969284A US 4616888 A US4616888 A US 4616888A
- Authority
- US
- United States
- Prior art keywords
- carriage
- plate
- brake
- lever
- carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
- B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B53/00—Cabinets or racks having several sections one behind the other
- A47B53/02—Cabinet systems, e.g. consisting of cabinets arranged in a row with means to open or close passages between adjacent cabinets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
- B62B5/0457—Braking mechanisms; Locking devices against movement by locking in a braking position
- B62B5/0461—Braking mechanisms; Locking devices against movement by locking in a braking position with positive engagement
Definitions
- This invention pertains to safety apparatus, and more particularly to safety devices for stopping a moving storage carriage.
- safety means is provided which is capable of protecting a person standing in the path of a moving carriage of a mobile storage system. This is accomplished by apparatus which includes a safety brake in combination with an anti-repeat electrical circuit for controlling the safety brake.
- the safety brake operates to quickly stop a moving storage carriage.
- the brake is preferably of the energy dissipating type.
- the brake includes a pair of spring loaded friction discs for bearing against a plate interposed therebetween.
- the plate and friction discs normally rotate with one of the axles which support and roll the storage carriage along the system rails.
- the plate is selectively lockable against rotation, and when locked, the energy of the moving carriage and axles is dissipated as heat between the friction discs and the plate.
- the plate may be formed with peripheral notches which are engaged by a toothed lever operated by a mechanical motion producing device such as an electrical solenoid.
- the motion producing device is actuated by safety switches placed at readily assessible locations throughout the mobile storage system.
- the safety switches form part of a circuit which controls the motion producing device for operating the safety brake.
- the control circuit is preferably an electrical circuit, and it includes time delay and anti-repeat features. Upon actuating a safety switch, the brake is immediately applied, and it remains applied for a predetermined time regardless of the condition of the actuated or other switches in the circuit. The time delay permits a person to safely leave the dangerous location before the brake is released.
- the anti-repeat feature requires that all safety switches be released before the circuit can be again actuated. That feature prevents draining of the power source in case a switch is accidentally held closed for an extended time.
- FIG. 1 is a side view of a typical mobile storage system which advantageously employs the present invention
- FIG. 2 is a partial sectional view taken along lines 2--2 of FIG. 1;
- FIG. 3 is a top view, partially in section, taken along line 3--3 of FIG. 2;
- FIG. 4 is a partial sectional view taken along lines 4--4 of FIG. 1;
- FIG. 5 is a schematic view of the electrical circuit for controlling the safety brake of the present invention.
- a mobile storage system which includes the present invention.
- the mobile storage system finds particular usefulness for storing books and files in libraries and offices, but the invention is not limited to storage system applications.
- the mobile storage system 1 typically includes a fixed bookcase-like storage unit 3 and several movable storage carriages 5. To easily move the carriages 5, they are equipped with wheels 7 which ride along two or more parallel rails 9 in a well-known manner. See FIG. 2.
- the rails 9 are firmly embedded in the floor 11 of the office or library.
- the wheels 7 are fixed to axles 13, which are mounted for rotation in conventional pillow blocks 15 secured to the carriage frame 17 in a known manner.
- axles 13 To move a carriage along the rails, one or more axles thereof are rotatably driven by a conventional mechanical or electrical driving mechanism, not shown. Movement of the carriage creates or eliminates aisles 18 between the carriages, FIG. 1.
- each carriage 5 is provided with a safety mechanism for automatically stopping a moving carriage and thereby preventing injury to a person caught in an aisle 18 adjacent the moving carriage.
- Automatic stopping is especially important with electrically powered carriages.
- the safety mechanism may be designed as a mechanical chock positioned between a wheel 7 and a rail 9.
- the safety mechanism may be a pin adapted and controlled to engage suitable holes within a wheel.
- the safety mechanism is preferably an energy dissipating brake.
- the brake may be a caliper brake mounted to the carriage frame 17 for gripping opposite sides of a rail.
- the safety mechanism includes a friction type safety brake 19, FIG. 2.
- the safety brake 19 is mounted on an extension 21 of an axle 13.
- the safety brake includes a carrier 23 keyed to the shaft extension 21 for rotation therewith by a key 25.
- the carrier is retained on the shaft extension by a thrust washer 27 interposed between the carrier and a horizontal bar 29 mounted to the frame 17 in any suitable manner.
- the bar 29 may be partially supported by the end of the shaft extension and held axially in place by a thrust washer 30 and cotter pin 32.
- a bearing 34 is employed between the bar and shaft extension.
- a sleeve 31 is slipped over the hub portion 33 of the carrier 23, and over the sleeve 31 is placed a cylindrical plate 35 with a friction disc 37 on both sides thereof.
- a Belleville washer 39 is employed with a nut 41 which is threaded onto the carrier hub 33. It will be appreciated that turning the nut 41 on the hub varies the deflection of the Belleville washer 39 and thereby adjusts the axial force on the friction discs and plate. With sufficient axial force, the plate, friction discs, and Belleville washer rotate as a unit with the carrier and nut.
- the periphery of the plate 35 is formed with a plurality of notches 43.
- the present invention includes an operating mechanism for engaging the plate notches 43.
- the operating mechanism may be a reciprocatable member, such as the piston rod of a fluid powered cylinder adapted to engage the notches 43.
- the operating mechanism 45 comprises a lever 47 which pivots about a pin 49 inserted in the carriage bar 29.
- the lever 47 may pass through a straight sided opening 51 in the bar so that the lever is guided on the bottom and top surfaces by bar bottom wall 53 and a similar top wall, not illustrated in FIG. 3.
- one end of the lever is fabricated with a single tooth 55 which is configured to match the plate notches.
- the lever is pivoted for selectively engaging and disengaging the tooth 55 thereof with the plate notches by a source of mechanical motion, which may be a pneumatic device such as an air cylinder.
- the motion source is an electric solenoid 57 having a plunger 59 pinned to one end of a rod 61 with pin 63.
- the second end of the rod 61 is pinned with pin 65 to the second end 67 of the lever, which may be made as a clevis for straddling the pin 61.
- the lever is biased to the disengaged mode relative to the plate by a spring 69.
- a stop 71 may be attached to the bar 29.
- the safety brake and operating mechanism of the present invention may be actuated by pneumatic, mechanical, or electrical means.
- a preferred actuating mechanism 72 is illustrated for actuating safety brake 19 and operating mechanism 45.
- the actuating mechanism 72 includes a normally open safety sweep switch 73 in combination with a spring loaded safety bar 75.
- a safety bar 75 is mounted horizontally at a convenient height along the length of each side of the moving carriages 5 and also on each fixed unit 3.
- the ends of each safety bar are supported by a notched bracket 77.
- the safety bars are urged away from the carriage frames 17 by a spring 79 in each bracket 77.
- FIG. 4 dipicts the normal mode, wherein the safety sweep switch 73 is not actuated by the safety bar.
- the circuit includes a source of electrical power, such as a 12 volt battery 81.
- a conventional timer 83 and the several safety sweep switches 73 are in series within the circuit 80.
- the several safety sweep switches are in parallel, so that actuation of any one of them will actuate the operating mechanism 45 and safety brake 19.
- the solenoid 57 and the timer contact 85 are normally open.
- the timer 83 (FIG. 5) is employed to assure adequate time for the person to leave the aisle 18. A 2 second delay before the contact 85 reopens after actuating a switch 73 is considered adequate. At the end of the 12 second delay, the contact 85 opens, and the solenoid de-energizes. The spring 69 (FIG. 3) then pivots the lever 47 to the disengaged position with respect to plate 35.
- a safety sweep switch 73 may be held closed for an extended time, as, for example, by an object positioned against a safety bar 75.
- the circuit 80 includes an anti-repeat feature which requires that all safety sweep switches be returned to the open position before a new actuation can be initiated.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/649,692 US4616888A (en) | 1984-09-12 | 1984-09-12 | Safety brake for mobile storage apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/649,692 US4616888A (en) | 1984-09-12 | 1984-09-12 | Safety brake for mobile storage apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US4616888A true US4616888A (en) | 1986-10-14 |
Family
ID=24605853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/649,692 Expired - Lifetime US4616888A (en) | 1984-09-12 | 1984-09-12 | Safety brake for mobile storage apparatus |
Country Status (1)
Country | Link |
---|---|
US (1) | US4616888A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4743078A (en) * | 1986-09-22 | 1988-05-10 | Spacesaver Corporation | Movable storage unit control system |
US4745516A (en) * | 1986-01-27 | 1988-05-17 | Spacesaver Corporation | Safety floor and sweep with line power |
US5058507A (en) * | 1990-02-26 | 1991-10-22 | Spacesaver Corporation | Carriage drive for mobile storage system with drive chain tensioner |
US5069513A (en) * | 1990-09-27 | 1991-12-03 | Automated Storage & Retrieval Systems Of America | Mobile shelving safety floor |
US5360262A (en) * | 1993-02-19 | 1994-11-01 | White Storage And Retrieval Systems, Inc. | Safety device for movable storage units |
US5417486A (en) * | 1993-06-25 | 1995-05-23 | White Consolidated Ind Inc | Brake wedge for rail mounted cabinets |
US5435639A (en) * | 1994-03-31 | 1995-07-25 | Montel | Modular rail for mobile filing and storage systems |
US5443312A (en) * | 1994-04-07 | 1995-08-22 | Schluter; Robert J. | Rack assembly for facilitating access to wall and cabinet-mounted serviceable equipment |
USRE35047E (en) * | 1991-02-15 | 1995-10-03 | Wright Line, Inc. | Side-sliding storage rack for 3480 cartridges |
US20070252491A1 (en) * | 2006-04-27 | 2007-11-01 | Montel Inc. | Braking system for mobile storage unit |
GB2439309A (en) * | 2006-06-23 | 2007-12-27 | Spacesaver Corp | Mobile storage unit with electric motor and brake |
US20080264736A1 (en) * | 2007-04-30 | 2008-10-30 | Krause Sean R | Mechanical Safety Brake For A Mobile Storage System |
US8684145B2 (en) | 2010-04-07 | 2014-04-01 | Alcon Research, Ltd. | Systems and methods for console braking |
US8910344B2 (en) | 2010-04-07 | 2014-12-16 | Alcon Research, Ltd. | Systems and methods for caster obstacle management |
US9089367B2 (en) | 2010-04-08 | 2015-07-28 | Alcon Research, Ltd. | Patient eye level touch control |
US10150495B2 (en) * | 2016-06-17 | 2018-12-11 | Silver Cross (Ip) Limited | Wheel locking mechanism |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1421241A (en) * | 1920-05-15 | 1922-06-27 | Ingham Samuel | Let-off motion for looms |
US1953996A (en) * | 1930-04-21 | 1934-04-10 | Eugene V Taylor | Brake |
US3028619A (en) * | 1958-09-22 | 1962-04-10 | Schlage Lock Co | Hold open device for door closer |
US3961831A (en) * | 1974-03-23 | 1976-06-08 | Bar Productions (Bromsgrove) Limited | Storage assemblies |
US4518066A (en) * | 1983-04-15 | 1985-05-21 | Barr William A | Safety parking brake for automatic transmissions |
-
1984
- 1984-09-12 US US06/649,692 patent/US4616888A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1421241A (en) * | 1920-05-15 | 1922-06-27 | Ingham Samuel | Let-off motion for looms |
US1953996A (en) * | 1930-04-21 | 1934-04-10 | Eugene V Taylor | Brake |
US3028619A (en) * | 1958-09-22 | 1962-04-10 | Schlage Lock Co | Hold open device for door closer |
US3961831A (en) * | 1974-03-23 | 1976-06-08 | Bar Productions (Bromsgrove) Limited | Storage assemblies |
US4518066A (en) * | 1983-04-15 | 1985-05-21 | Barr William A | Safety parking brake for automatic transmissions |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4745516A (en) * | 1986-01-27 | 1988-05-17 | Spacesaver Corporation | Safety floor and sweep with line power |
US4743078A (en) * | 1986-09-22 | 1988-05-10 | Spacesaver Corporation | Movable storage unit control system |
US5058507A (en) * | 1990-02-26 | 1991-10-22 | Spacesaver Corporation | Carriage drive for mobile storage system with drive chain tensioner |
US5069513A (en) * | 1990-09-27 | 1991-12-03 | Automated Storage & Retrieval Systems Of America | Mobile shelving safety floor |
USRE35047E (en) * | 1991-02-15 | 1995-10-03 | Wright Line, Inc. | Side-sliding storage rack for 3480 cartridges |
US5360262A (en) * | 1993-02-19 | 1994-11-01 | White Storage And Retrieval Systems, Inc. | Safety device for movable storage units |
US5417486A (en) * | 1993-06-25 | 1995-05-23 | White Consolidated Ind Inc | Brake wedge for rail mounted cabinets |
US5435639A (en) * | 1994-03-31 | 1995-07-25 | Montel | Modular rail for mobile filing and storage systems |
US5443312A (en) * | 1994-04-07 | 1995-08-22 | Schluter; Robert J. | Rack assembly for facilitating access to wall and cabinet-mounted serviceable equipment |
US7645000B2 (en) | 2006-04-27 | 2010-01-12 | Montel Inc. | Braking system for mobile storage unit |
US20070252491A1 (en) * | 2006-04-27 | 2007-11-01 | Montel Inc. | Braking system for mobile storage unit |
GB2439309A (en) * | 2006-06-23 | 2007-12-27 | Spacesaver Corp | Mobile storage unit with electric motor and brake |
US7583037B2 (en) | 2006-06-23 | 2009-09-01 | Spacesaver Corporation | Mobile storage unit with holding brake and single status line for load and drive detection |
WO2008134730A1 (en) * | 2007-04-30 | 2008-11-06 | Spacesaver Corporation | Mechanical safety brake for a mobile storage system |
US20080264736A1 (en) * | 2007-04-30 | 2008-10-30 | Krause Sean R | Mechanical Safety Brake For A Mobile Storage System |
US7992949B2 (en) | 2007-04-30 | 2011-08-09 | Spacesaver Corporation | Mechanical safety brake for a mobile storage system |
US8684145B2 (en) | 2010-04-07 | 2014-04-01 | Alcon Research, Ltd. | Systems and methods for console braking |
US8910344B2 (en) | 2010-04-07 | 2014-12-16 | Alcon Research, Ltd. | Systems and methods for caster obstacle management |
US9089367B2 (en) | 2010-04-08 | 2015-07-28 | Alcon Research, Ltd. | Patient eye level touch control |
US10150495B2 (en) * | 2016-06-17 | 2018-12-11 | Silver Cross (Ip) Limited | Wheel locking mechanism |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SPACESAVER CORPORATION, FORT ATKINSON, WI A WI CO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PETERMAN, ROBERT J.;REEL/FRAME:004316/0401 Effective date: 19840830 Owner name: SPACESAVER CORPORATION, A WI CORP.,WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PETERMAN, ROBERT J.;REEL/FRAME:004316/0401 Effective date: 19840830 |
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Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
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FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |